var messageNotFilledIn            = 'Not filled in';
    var messageInvalid                = 'Invalid';
    var messagePhotoSize            = 'Photo size';
    var messageMustBeBetween        = 'must be between';
    
    function checkFields_(f)
    {
        if (!checkFields(f))
            return false;
        else
            if (f.words.value.length<3)
            {
                alert('Please enter a key word more than two characters long.');
                return false;
            }
        return true;
    }
    
    function searchOnBlur(obj){
      var f=obj.form;
      if (f.words.value == '')
        f.words.value = f.words.defaultValue;
    }

    function searchOnFocus(obj){
      var f=obj.form;
      if (f.words.value == f.words.defaultValue)
        f.words.value = '';
    }